Netgear ProSafe FVX538 User Manual download pdf (Page 13)

Network Planning Guide for ProSafe VPN Firewall Router FVX538

Network Planning 2-3

October 2004

Figure 2-2: Dual WAN ports for load balancing

Single or Multiple Exposed Hosts

Incoming traffic from the Internet is normally discarded by the firewall unless the traffic is a

response to one of your local computers or a service that you have configured in the Inbound Rules

menu. Instead of discarding this traffic, you can have it forwarded to one or more LAN hosts on

your network. These LAN hosts are called exposed hosts.

The addressing of the router’s dual WAN port depends on the configuration being implemented:

Single Exposed Host

The Internet IP address of the router’s WAN port must be known to the public so that the public

can send incoming traffic to the exposed host when this feature is supported and enabled.

Table 2-1. IP addressing requirements for exposed hosts in dual WAN port systems

Configuration and

WAN IP address

Single WAN Port

(reference case)

Dual WAN Port Cases

Failover Load Balancing

Single exposed host Fixed Allowed

(FQDN optional)

FQDN required Allowed

(FQDN optional)

Dynamic FQDN required FQDN required FQDN required

Multiple exposed

hosts

Fixed Address block

required

(FQDN optional)

Not allowed

a. Not allowed because to do so, the IP addresses of each WAN port would have to be the identical range of

fixed addresses.

Address block

required

(FQDN optional)

Dynamic Not allowed Not allowed Not allowed

Router

netgear1.dyndns.org

WAN1 IP

Dual WAN Ports (Load Balancing)

WAN2 IP

netgear2.dyndns.org

Use of fully-qualified domain names for IP addresses of WAN ports:

o required for dynamic IP addresses

o optional for fixed IP addresses

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Netgear ProSafe FVX538 User Manual Page 13

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